public ClassGSM(string model, string manufacturer, double price, string owner, Battery battery, Display display)
: this(model, manufacturer)
{
this.Price = price;
this.Owner = owner;
this.Battery = battery;
this.Display = display;
}
public ClassGSM(string model, string manufacturer, Battery battery)
: this(model, manufacturer)
{
this.Battery = battery;
}
